function Map(el) {
  this.el = el;
  this.width = 800;
  this.height = 400;
}
Map.prototype.create = function() {
  this.el.style.width = this.width + "px";
  this.el.style.height = this.height + "px";
  this.el.style.background = "url(./bg.png)";
  this.el.style.border = "10px solid blue";
  this.el.style.position = "relative";
};
